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在遵循国家标准的原则下设计和制作了孔板测流系统．并用孔板测流中随机采集的试验数据分析和计算孔板测流中的系统误差和随机误差．论证所设计的孔板测流系统符合国标Ｂ级精度．
In accordance with the principles of national standards designed and manufactured a plate flow measurement system. The systematic errors and random errors in orifice flow measurement were analyzed and calculated with the test data collected randomly from orifice flow measurement. Demonstration designed orifice flow measurement system in line with the national standard B-level accuracy.